Four of the five choices listed below are
characteristics of mutations. Select the exception.
a. predictable
b. harmful or beneficial
c. random
d. effects depend upon environment
e. heritable
Answer: a
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For nations with relatively high wage rates,
a. the wage costs per unit of a good produced are usually relatively high. b. foreign exporters have an unfair advantage over domestic producers. c. tariffs would improve the allocation of scarce resources. d. the wage rates often reflect relatively high labor productivity.
Within the chordate classes, the unique characteristic of the class Aves is:
a. flight. b. production of uric acid. c. feathers. d. endothermy. e. a forked tongue
An RNA molecule that can catalyze chemical reactions is called a_____.
A) stem-loop B) ribozyme C) protein D) Tetrahymena
Haploid nuclei
a. contain one set of chromosomes. b. contain two sets of chromosomes. c. contain half a set of chromosomes. d. are found in the cytosol of eukaryotic organisms.